20838820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 49996800

約数和(自身を除く): 29157980

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 31, 38, 58, 61, 62, 76, 95, 116, 122, 124, 145, 155, 190, 244, 290, 305, 310, 380, 551, 580, 589, 610, 620, 899, 1102, 1159, 1178, 1220, 1769, 1798, 1891, 2204, 2318, 2356, 2755, 2945, 3538, 3596, 3782, 4495, 4636, 5510, 5795, 5890, 7076, 7564, 8845, 8990, 9455, 11020, 11590, 11780, 17081, 17690, 17980, 18910, 23180, 33611, 34162, 35380, 35929, 37820, 54839, 67222, 68324, 71858, 85405, 109678, 134444, 143716, 168055, 170810, 179645, 219356, 274195, 336110, 341620, 359290, 548390, 672220, 718580, 1041941, 1096780, 2083882, 4167764, 5209705, 10419410, 20838820]

約数ペア:

[(1, 20838820), (2, 10419410), (4, 5209705), (5, 4167764), (10, 2083882), (19, 1096780), (20, 1041941), (29, 718580), (31, 672220), (38, 548390), (58, 359290), (61, 341620), (62, 336110), (76, 274195), (95, 219356), (116, 179645), (122, 170810), (124, 168055), (145, 143716), (155, 134444), (190, 109678), (244, 85405), (290, 71858), (305, 68324), (310, 67222), (380, 54839), (551, 37820), (580, 35929), (589, 35380), (610, 34162), (620, 33611), (899, 23180), (1102, 18910), (1159, 17980), (1178, 17690), (1220, 17081), (1769, 11780), (1798, 11590), (1891, 11020), (2204, 9455), (2318, 8990), (2356, 8845), (2755, 7564), (2945, 7076), (3538, 5890), (3596, 5795), (3782, 5510), (4495, 4636)]