15721804215

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{2843}}^1$

素因数の和:3030

約数の個数: 128

約数和(自身を含む): 31648942080

約数和(自身を除く): 15927137865

約数列:

[1, 3, 5, 9, 13, 15, 23, 27, 39, 45, 65, 69, 115, 117, 135, 137, 195, 207, 299, 345, 351, 411, 585, 621, 685, 897, 1035, 1233, 1495, 1755, 1781, 2055, 2691, 2843, 3105, 3151, 3699, 4485, 5343, 6165, 8073, 8529, 8905, 9453, 13455, 14215, 15755, 16029, 18495, 25587, 26715, 28359, 36959, 40365, 40963, 42645, 47265, 48087, 65389, 76761, 80145, 85077, 110877, 122889, 127935, 141795, 184795, 196167, 204815, 240435, 326945, 332631, 368667, 383805, 389491, 425385, 554385, 588501, 614445, 850057, 980835, 997893, 1106001, 1168473, 1663155, 1765503, 1843335, 1947455, 2550171, 2942505, 3505419, 4250285, 4989465, 5063383, 5530005, 5842365, 7650513, 8827515, 8958293, 10516257, 12750855, 15190149, 17527095, 22951539, 25316915, 26874879, 38252565, 44791465, 45570447, 52581285, 75950745, 80624637, 114757695, 116457809, 134374395, 136711341, 227852235, 241873911, 349373427, 403123185, 582289045, 683556705, 1048120281, 1209369555, 1746867135, 3144360843, 5240601405, 15721804215]

約数ペア:

[(1, 15721804215), (3, 5240601405), (5, 3144360843), (9, 1746867135), (13, 1209369555), (15, 1048120281), (23, 683556705), (27, 582289045), (39, 403123185), (45, 349373427), (65, 241873911), (69, 227852235), (115, 136711341), (117, 134374395), (135, 116457809), (137, 114757695), (195, 80624637), (207, 75950745), (299, 52581285), (345, 45570447), (351, 44791465), (411, 38252565), (585, 26874879), (621, 25316915), (685, 22951539), (897, 17527095), (1035, 15190149), (1233, 12750855), (1495, 10516257), (1755, 8958293), (1781, 8827515), (2055, 7650513), (2691, 5842365), (2843, 5530005), (3105, 5063383), (3151, 4989465), (3699, 4250285), (4485, 3505419), (5343, 2942505), (6165, 2550171), (8073, 1947455), (8529, 1843335), (8905, 1765503), (9453, 1663155), (13455, 1168473), (14215, 1106001), (15755, 997893), (16029, 980835), (18495, 850057), (25587, 614445), (26715, 588501), (28359, 554385), (36959, 425385), (40365, 389491), (40963, 383805), (42645, 368667), (47265, 332631), (48087, 326945), (65389, 240435), (76761, 204815), (80145, 196167), (85077, 184795), (110877, 141795), (122889, 127935)]