21975660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{163}}^1$

素因数の和:292

約数の個数: 144

約数和(自身を含む): 77366016

約数和(自身を除く): 55390356

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 107, 126, 140, 163, 180, 210, 214, 252, 315, 321, 326, 420, 428, 489, 535, 630, 642, 652, 749, 815, 963, 978, 1070, 1141, 1260, 1284, 1467, 1498, 1605, 1630, 1926, 1956, 2140, 2247, 2282, 2445, 2934, 2996, 3210, 3260, 3423, 3745, 3852, 4494, 4564, 4815, 4890, 5705, 5868, 6420, 6741, 6846, 7335, 7490, 8988, 9630, 9780, 10269, 11235, 11410, 13482, 13692, 14670, 14980, 17115, 17441, 19260, 20538, 22470, 22820, 26964, 29340, 33705, 34230, 34882, 41076, 44940, 51345, 52323, 67410, 68460, 69764, 87205, 102690, 104646, 122087, 134820, 156969, 174410, 205380, 209292, 244174, 261615, 313938, 348820, 366261, 488348, 523230, 610435, 627876, 732522, 784845, 1046460, 1098783, 1220870, 1465044, 1569690, 1831305, 2197566, 2441740, 3139380, 3662610, 4395132, 5493915, 7325220, 10987830, 21975660]

約数ペア:

[(1, 21975660), (2, 10987830), (3, 7325220), (4, 5493915), (5, 4395132), (6, 3662610), (7, 3139380), (9, 2441740), (10, 2197566), (12, 1831305), (14, 1569690), (15, 1465044), (18, 1220870), (20, 1098783), (21, 1046460), (28, 784845), (30, 732522), (35, 627876), (36, 610435), (42, 523230), (45, 488348), (60, 366261), (63, 348820), (70, 313938), (84, 261615), (90, 244174), (105, 209292), (107, 205380), (126, 174410), (140, 156969), (163, 134820), (180, 122087), (210, 104646), (214, 102690), (252, 87205), (315, 69764), (321, 68460), (326, 67410), (420, 52323), (428, 51345), (489, 44940), (535, 41076), (630, 34882), (642, 34230), (652, 33705), (749, 29340), (815, 26964), (963, 22820), (978, 22470), (1070, 20538), (1141, 19260), (1260, 17441), (1284, 17115), (1467, 14980), (1498, 14670), (1605, 13692), (1630, 13482), (1926, 11410), (1956, 11235), (2140, 10269), (2247, 9780), (2282, 9630), (2445, 8988), (2934, 7490), (2996, 7335), (3210, 6846), (3260, 6741), (3423, 6420), (3745, 5868), (3852, 5705), (4494, 4890), (4564, 4815)]