21235620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:290

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 50469468

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 31, 35, 42, 49, 60, 62, 70, 84, 93, 98, 105, 124, 140, 147, 155, 186, 196, 210, 217, 233, 245, 294, 310, 372, 420, 434, 465, 466, 490, 588, 620, 651, 699, 735, 868, 930, 932, 980, 1085, 1165, 1302, 1398, 1470, 1519, 1631, 1860, 2170, 2330, 2604, 2796, 2940, 3038, 3255, 3262, 3495, 4340, 4557, 4660, 4893, 6076, 6510, 6524, 6990, 7223, 7595, 8155, 9114, 9786, 11417, 13020, 13980, 14446, 15190, 16310, 18228, 19572, 21669, 22785, 22834, 24465, 28892, 30380, 32620, 34251, 36115, 43338, 45570, 45668, 48930, 50561, 57085, 68502, 72230, 86676, 91140, 97860, 101122, 108345, 114170, 137004, 144460, 151683, 171255, 202244, 216690, 228340, 252805, 303366, 342510, 353927, 433380, 505610, 606732, 685020, 707854, 758415, 1011220, 1061781, 1415708, 1516830, 1769635, 2123562, 3033660, 3539270, 4247124, 5308905, 7078540, 10617810, 21235620]

約数ペア:

[(1, 21235620), (2, 10617810), (3, 7078540), (4, 5308905), (5, 4247124), (6, 3539270), (7, 3033660), (10, 2123562), (12, 1769635), (14, 1516830), (15, 1415708), (20, 1061781), (21, 1011220), (28, 758415), (30, 707854), (31, 685020), (35, 606732), (42, 505610), (49, 433380), (60, 353927), (62, 342510), (70, 303366), (84, 252805), (93, 228340), (98, 216690), (105, 202244), (124, 171255), (140, 151683), (147, 144460), (155, 137004), (186, 114170), (196, 108345), (210, 101122), (217, 97860), (233, 91140), (245, 86676), (294, 72230), (310, 68502), (372, 57085), (420, 50561), (434, 48930), (465, 45668), (466, 45570), (490, 43338), (588, 36115), (620, 34251), (651, 32620), (699, 30380), (735, 28892), (868, 24465), (930, 22834), (932, 22785), (980, 21669), (1085, 19572), (1165, 18228), (1302, 16310), (1398, 15190), (1470, 14446), (1519, 13980), (1631, 13020), (1860, 11417), (2170, 9786), (2330, 9114), (2604, 8155), (2796, 7595), (2940, 7223), (3038, 6990), (3255, 6524), (3262, 6510), (3495, 6076), (4340, 4893), (4557, 4660)]