19997460

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{269}}^1$

素因数の和:350

約数の個数: 144

約数和(自身を含む): 70761600

約数和(自身を除く): 50764140

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 59, 60, 63, 70, 84, 90, 105, 118, 126, 140, 177, 180, 210, 236, 252, 269, 295, 315, 354, 413, 420, 531, 538, 590, 630, 708, 807, 826, 885, 1062, 1076, 1180, 1239, 1260, 1345, 1614, 1652, 1770, 1883, 2065, 2124, 2421, 2478, 2655, 2690, 3228, 3540, 3717, 3766, 4035, 4130, 4842, 4956, 5310, 5380, 5649, 6195, 7434, 7532, 8070, 8260, 9415, 9684, 10620, 11298, 12105, 12390, 14868, 15871, 16140, 16947, 18585, 18830, 22596, 24210, 24780, 28245, 31742, 33894, 37170, 37660, 47613, 48420, 56490, 63484, 67788, 74340, 79355, 84735, 95226, 111097, 112980, 142839, 158710, 169470, 190452, 222194, 238065, 285678, 317420, 333291, 338940, 444388, 476130, 555485, 571356, 666582, 714195, 952260, 999873, 1110970, 1333164, 1428390, 1666455, 1999746, 2221940, 2856780, 3332910, 3999492, 4999365, 6665820, 9998730, 19997460]

約数ペア:

[(1, 19997460), (2, 9998730), (3, 6665820), (4, 4999365), (5, 3999492), (6, 3332910), (7, 2856780), (9, 2221940), (10, 1999746), (12, 1666455), (14, 1428390), (15, 1333164), (18, 1110970), (20, 999873), (21, 952260), (28, 714195), (30, 666582), (35, 571356), (36, 555485), (42, 476130), (45, 444388), (59, 338940), (60, 333291), (63, 317420), (70, 285678), (84, 238065), (90, 222194), (105, 190452), (118, 169470), (126, 158710), (140, 142839), (177, 112980), (180, 111097), (210, 95226), (236, 84735), (252, 79355), (269, 74340), (295, 67788), (315, 63484), (354, 56490), (413, 48420), (420, 47613), (531, 37660), (538, 37170), (590, 33894), (630, 31742), (708, 28245), (807, 24780), (826, 24210), (885, 22596), (1062, 18830), (1076, 18585), (1180, 16947), (1239, 16140), (1260, 15871), (1345, 14868), (1614, 12390), (1652, 12105), (1770, 11298), (1883, 10620), (2065, 9684), (2124, 9415), (2421, 8260), (2478, 8070), (2655, 7532), (2690, 7434), (3228, 6195), (3540, 5649), (3717, 5380), (3766, 5310), (4035, 4956), (4130, 4842)]