20844180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:326

約数の個数: 144

約数和(自身を含む): 73592064

約数和(自身を除く): 52747884

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, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 233, 252, 284, 315, 355, 420, 426, 466, 497, 630, 639, 699, 710, 852, 932, 994, 1065, 1165, 1260, 1278, 1398, 1420, 1491, 1631, 1988, 2097, 2130, 2330, 2485, 2556, 2796, 2982, 3195, 3262, 3495, 4194, 4260, 4473, 4660, 4893, 4970, 5964, 6390, 6524, 6990, 7455, 8155, 8388, 8946, 9786, 9940, 10485, 12780, 13980, 14679, 14910, 16310, 16543, 17892, 19572, 20970, 22365, 24465, 29358, 29820, 32620, 33086, 41940, 44730, 48930, 49629, 58716, 66172, 73395, 82715, 89460, 97860, 99258, 115801, 146790, 148887, 165430, 198516, 231602, 248145, 293580, 297774, 330860, 347403, 463204, 496290, 579005, 595548, 694806, 744435, 992580, 1042209, 1158010, 1389612, 1488870, 1737015, 2084418, 2316020, 2977740, 3474030, 4168836, 5211045, 6948060, 10422090, 20844180]

約数ペア:

[(1, 20844180), (2, 10422090), (3, 6948060), (4, 5211045), (5, 4168836), (6, 3474030), (7, 2977740), (9, 2316020), (10, 2084418), (12, 1737015), (14, 1488870), (15, 1389612), (18, 1158010), (20, 1042209), (21, 992580), (28, 744435), (30, 694806), (35, 595548), (36, 579005), (42, 496290), (45, 463204), (60, 347403), (63, 330860), (70, 297774), (71, 293580), (84, 248145), (90, 231602), (105, 198516), (126, 165430), (140, 148887), (142, 146790), (180, 115801), (210, 99258), (213, 97860), (233, 89460), (252, 82715), (284, 73395), (315, 66172), (355, 58716), (420, 49629), (426, 48930), (466, 44730), (497, 41940), (630, 33086), (639, 32620), (699, 29820), (710, 29358), (852, 24465), (932, 22365), (994, 20970), (1065, 19572), (1165, 17892), (1260, 16543), (1278, 16310), (1398, 14910), (1420, 14679), (1491, 13980), (1631, 12780), (1988, 10485), (2097, 9940), (2130, 9786), (2330, 8946), (2485, 8388), (2556, 8155), (2796, 7455), (2982, 6990), (3195, 6524), (3262, 6390), (3495, 5964), (4194, 4970), (4260, 4893), (4473, 4660)]