18834860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:255

約数の個数: 72

約数和(自身を含む): 44732688

約数和(自身を除く): 25897828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 121, 172, 181, 215, 220, 242, 362, 430, 473, 484, 605, 724, 860, 905, 946, 1210, 1810, 1892, 1991, 2365, 2420, 3620, 3982, 4730, 5203, 7783, 7964, 9460, 9955, 10406, 15566, 19910, 20812, 21901, 26015, 31132, 38915, 39820, 43802, 52030, 77830, 85613, 87604, 104060, 109505, 155660, 171226, 219010, 342452, 428065, 438020, 856130, 941743, 1712260, 1883486, 3766972, 4708715, 9417430, 18834860]

約数ペア:

[(1, 18834860), (2, 9417430), (4, 4708715), (5, 3766972), (10, 1883486), (11, 1712260), (20, 941743), (22, 856130), (43, 438020), (44, 428065), (55, 342452), (86, 219010), (110, 171226), (121, 155660), (172, 109505), (181, 104060), (215, 87604), (220, 85613), (242, 77830), (362, 52030), (430, 43802), (473, 39820), (484, 38915), (605, 31132), (724, 26015), (860, 21901), (905, 20812), (946, 19910), (1210, 15566), (1810, 10406), (1892, 9955), (1991, 9460), (2365, 7964), (2420, 7783), (3620, 5203), (3982, 4730)]