20995590

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:238

約数の個数: 128

約数和(自身を含む): 64281600

約数和(自身を除く): 43286010

約数列:

[1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 30, 33, 35, 42, 55, 61, 66, 70, 77, 105, 110, 122, 149, 154, 165, 183, 210, 231, 298, 305, 330, 366, 385, 427, 447, 462, 610, 671, 745, 770, 854, 894, 915, 1043, 1155, 1281, 1342, 1490, 1639, 1830, 2013, 2086, 2135, 2235, 2310, 2562, 3129, 3278, 3355, 4026, 4270, 4470, 4697, 4917, 5215, 6258, 6405, 6710, 8195, 9089, 9394, 9834, 10065, 10430, 11473, 12810, 14091, 15645, 16390, 18178, 20130, 22946, 23485, 24585, 27267, 28182, 31290, 34419, 45445, 46970, 49170, 54534, 57365, 63623, 68838, 70455, 90890, 99979, 114730, 127246, 136335, 140910, 172095, 190869, 199958, 272670, 299937, 318115, 344190, 381738, 499895, 599874, 636230, 699853, 954345, 999790, 1399706, 1499685, 1908690, 2099559, 2999370, 3499265, 4199118, 6998530, 10497795, 20995590]

約数ペア:

[(1, 20995590), (2, 10497795), (3, 6998530), (5, 4199118), (6, 3499265), (7, 2999370), (10, 2099559), (11, 1908690), (14, 1499685), (15, 1399706), (21, 999790), (22, 954345), (30, 699853), (33, 636230), (35, 599874), (42, 499895), (55, 381738), (61, 344190), (66, 318115), (70, 299937), (77, 272670), (105, 199958), (110, 190869), (122, 172095), (149, 140910), (154, 136335), (165, 127246), (183, 114730), (210, 99979), (231, 90890), (298, 70455), (305, 68838), (330, 63623), (366, 57365), (385, 54534), (427, 49170), (447, 46970), (462, 45445), (610, 34419), (671, 31290), (745, 28182), (770, 27267), (854, 24585), (894, 23485), (915, 22946), (1043, 20130), (1155, 18178), (1281, 16390), (1342, 15645), (1490, 14091), (1639, 12810), (1830, 11473), (2013, 10430), (2086, 10065), (2135, 9834), (2235, 9394), (2310, 9089), (2562, 8195), (3129, 6710), (3278, 6405), (3355, 6258), (4026, 5215), (4270, 4917), (4470, 4697)]