90505580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{149}}^1\times {\mathrm{251}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 211150800

約数和(自身を除く): 120645220

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 149, 220, 242, 251, 298, 484, 502, 596, 605, 745, 1004, 1210, 1255, 1490, 1639, 2420, 2510, 2761, 2980, 3278, 5020, 5522, 6556, 8195, 11044, 13805, 16390, 18029, 27610, 30371, 32780, 36058, 37399, 55220, 60742, 72116, 74798, 90145, 121484, 149596, 151855, 180290, 186995, 303710, 360580, 373990, 411389, 607420, 747980, 822778, 1645556, 2056945, 4113890, 4525279, 8227780, 9050558, 18101116, 22626395, 45252790, 90505580]

約数ペア:

[(1, 90505580), (2, 45252790), (4, 22626395), (5, 18101116), (10, 9050558), (11, 8227780), (20, 4525279), (22, 4113890), (44, 2056945), (55, 1645556), (110, 822778), (121, 747980), (149, 607420), (220, 411389), (242, 373990), (251, 360580), (298, 303710), (484, 186995), (502, 180290), (596, 151855), (605, 149596), (745, 121484), (1004, 90145), (1210, 74798), (1255, 72116), (1490, 60742), (1639, 55220), (2420, 37399), (2510, 36058), (2761, 32780), (2980, 30371), (3278, 27610), (5020, 18029), (5522, 16390), (6556, 13805), (8195, 11044)]