19901250

素因数分解:

$2^1\times 3^2\times 5^4\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:118

約数の個数: 120

約数和(自身を含む): 56653740

約数和(自身を除く): 36752490

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 29, 30, 45, 50, 58, 61, 75, 87, 90, 122, 125, 145, 150, 174, 183, 225, 250, 261, 290, 305, 366, 375, 435, 450, 522, 549, 610, 625, 725, 750, 870, 915, 1098, 1125, 1250, 1305, 1450, 1525, 1769, 1830, 1875, 2175, 2250, 2610, 2745, 3050, 3538, 3625, 3750, 4350, 4575, 5307, 5490, 5625, 6525, 7250, 7625, 8845, 9150, 10614, 10875, 11250, 13050, 13725, 15250, 15921, 17690, 18125, 21750, 22875, 26535, 27450, 31842, 32625, 36250, 38125, 44225, 45750, 53070, 54375, 65250, 68625, 76250, 79605, 88450, 108750, 114375, 132675, 137250, 159210, 163125, 221125, 228750, 265350, 326250, 343125, 398025, 442250, 663375, 686250, 796050, 1105625, 1326750, 1990125, 2211250, 3316875, 3980250, 6633750, 9950625, 19901250]

約数ペア:

[(1, 19901250), (2, 9950625), (3, 6633750), (5, 3980250), (6, 3316875), (9, 2211250), (10, 1990125), (15, 1326750), (18, 1105625), (25, 796050), (29, 686250), (30, 663375), (45, 442250), (50, 398025), (58, 343125), (61, 326250), (75, 265350), (87, 228750), (90, 221125), (122, 163125), (125, 159210), (145, 137250), (150, 132675), (174, 114375), (183, 108750), (225, 88450), (250, 79605), (261, 76250), (290, 68625), (305, 65250), (366, 54375), (375, 53070), (435, 45750), (450, 44225), (522, 38125), (549, 36250), (610, 32625), (625, 31842), (725, 27450), (750, 26535), (870, 22875), (915, 21750), (1098, 18125), (1125, 17690), (1250, 15921), (1305, 15250), (1450, 13725), (1525, 13050), (1769, 11250), (1830, 10875), (1875, 10614), (2175, 9150), (2250, 8845), (2610, 7625), (2745, 7250), (3050, 6525), (3538, 5625), (3625, 5490), (3750, 5307), (4350, 4575)]