81333140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{557}}^1$

素因数の和:729

約数の個数: 72

約数和(自身を含む): 200377800

約数和(自身を除く): 119044660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 149, 196, 245, 298, 490, 557, 596, 745, 980, 1043, 1114, 1490, 2086, 2228, 2785, 2980, 3899, 4172, 5215, 5570, 7301, 7798, 10430, 11140, 14602, 15596, 19495, 20860, 27293, 29204, 36505, 38990, 54586, 73010, 77980, 82993, 109172, 136465, 146020, 165986, 272930, 331972, 414965, 545860, 580951, 829930, 1161902, 1659860, 2323804, 2904755, 4066657, 5809510, 8133314, 11619020, 16266628, 20333285, 40666570, 81333140]

約数ペア:

[(1, 81333140), (2, 40666570), (4, 20333285), (5, 16266628), (7, 11619020), (10, 8133314), (14, 5809510), (20, 4066657), (28, 2904755), (35, 2323804), (49, 1659860), (70, 1161902), (98, 829930), (140, 580951), (149, 545860), (196, 414965), (245, 331972), (298, 272930), (490, 165986), (557, 146020), (596, 136465), (745, 109172), (980, 82993), (1043, 77980), (1114, 73010), (1490, 54586), (2086, 38990), (2228, 36505), (2785, 29204), (2980, 27293), (3899, 20860), (4172, 19495), (5215, 15596), (5570, 14602), (7301, 11140), (7798, 10430)]