21820920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1$

素因数の和:357

約数の個数: 128

約数和(自身を含む): 72852480

約数和(自身を除く): 51031560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 61, 66, 88, 110, 120, 122, 132, 165, 183, 220, 244, 264, 271, 305, 330, 366, 440, 488, 542, 610, 660, 671, 732, 813, 915, 1084, 1220, 1320, 1342, 1355, 1464, 1626, 1830, 2013, 2168, 2440, 2684, 2710, 2981, 3252, 3355, 3660, 4026, 4065, 5368, 5420, 5962, 6504, 6710, 7320, 8052, 8130, 8943, 10065, 10840, 11924, 13420, 14905, 16104, 16260, 16531, 17886, 20130, 23848, 26840, 29810, 32520, 33062, 35772, 40260, 44715, 49593, 59620, 66124, 71544, 80520, 82655, 89430, 99186, 119240, 132248, 165310, 178860, 181841, 198372, 247965, 330620, 357720, 363682, 396744, 495930, 545523, 661240, 727364, 909205, 991860, 1091046, 1454728, 1818410, 1983720, 2182092, 2727615, 3636820, 4364184, 5455230, 7273640, 10910460, 21820920]

約数ペア:

[(1, 21820920), (2, 10910460), (3, 7273640), (4, 5455230), (5, 4364184), (6, 3636820), (8, 2727615), (10, 2182092), (11, 1983720), (12, 1818410), (15, 1454728), (20, 1091046), (22, 991860), (24, 909205), (30, 727364), (33, 661240), (40, 545523), (44, 495930), (55, 396744), (60, 363682), (61, 357720), (66, 330620), (88, 247965), (110, 198372), (120, 181841), (122, 178860), (132, 165310), (165, 132248), (183, 119240), (220, 99186), (244, 89430), (264, 82655), (271, 80520), (305, 71544), (330, 66124), (366, 59620), (440, 49593), (488, 44715), (542, 40260), (610, 35772), (660, 33062), (671, 32520), (732, 29810), (813, 26840), (915, 23848), (1084, 20130), (1220, 17886), (1320, 16531), (1342, 16260), (1355, 16104), (1464, 14905), (1626, 13420), (1830, 11924), (2013, 10840), (2168, 10065), (2440, 8943), (2684, 8130), (2710, 8052), (2981, 7320), (3252, 6710), (3355, 6504), (3660, 5962), (4026, 5420), (4065, 5368)]