21208970685

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{1063}}^1$

素因数の和:1307

約数の個数: 128

約数和(自身を含む): 41723781120

約数和(自身を除く): 20514810435

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 73, 95, 105, 133, 137, 219, 285, 365, 399, 411, 511, 665, 685, 959, 1063, 1095, 1387, 1533, 1995, 2055, 2555, 2603, 2877, 3189, 4161, 4795, 5315, 6935, 7441, 7665, 7809, 9709, 10001, 13015, 14385, 15945, 18221, 20197, 20805, 22323, 29127, 30003, 37205, 39045, 48545, 50005, 54663, 60591, 70007, 77599, 91105, 100985, 111615, 141379, 145631, 145635, 150015, 190019, 210021, 232797, 273315, 302955, 350035, 387995, 424137, 436893, 543193, 570057, 706895, 728155, 950095, 1019417, 1050105, 1163985, 1330133, 1474381, 1629579, 2120685, 2184465, 2715965, 2766989, 2850285, 3058251, 3990399, 4423143, 5097085, 6650665, 7371905, 8147895, 8300967, 10320667, 10631063, 13834945, 15291255, 19368923, 19951995, 22115715, 30962001, 31893189, 41504835, 51603335, 53155315, 58106769, 74417441, 96844615, 154810005, 159465945, 201990197, 223252323, 290533845, 372087205, 605970591, 1009950985, 1116261615, 1413931379, 3029852955, 4241794137, 7069656895, 21208970685]

約数ペア:

[(1, 21208970685), (3, 7069656895), (5, 4241794137), (7, 3029852955), (15, 1413931379), (19, 1116261615), (21, 1009950985), (35, 605970591), (57, 372087205), (73, 290533845), (95, 223252323), (105, 201990197), (133, 159465945), (137, 154810005), (219, 96844615), (285, 74417441), (365, 58106769), (399, 53155315), (411, 51603335), (511, 41504835), (665, 31893189), (685, 30962001), (959, 22115715), (1063, 19951995), (1095, 19368923), (1387, 15291255), (1533, 13834945), (1995, 10631063), (2055, 10320667), (2555, 8300967), (2603, 8147895), (2877, 7371905), (3189, 6650665), (4161, 5097085), (4795, 4423143), (5315, 3990399), (6935, 3058251), (7441, 2850285), (7665, 2766989), (7809, 2715965), (9709, 2184465), (10001, 2120685), (13015, 1629579), (14385, 1474381), (15945, 1330133), (18221, 1163985), (20197, 1050105), (20805, 1019417), (22323, 950095), (29127, 728155), (30003, 706895), (37205, 570057), (39045, 543193), (48545, 436893), (50005, 424137), (54663, 387995), (60591, 350035), (70007, 302955), (77599, 273315), (91105, 232797), (100985, 210021), (111615, 190019), (141379, 150015), (145631, 145635)]