21861280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:302

約数の個数: 96

約数和(自身を含む): 59875200

約数和(自身を除く): 38013920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 131, 140, 149, 160, 224, 262, 280, 298, 524, 560, 596, 655, 745, 917, 1043, 1048, 1120, 1192, 1310, 1490, 1834, 2086, 2096, 2384, 2620, 2980, 3668, 4172, 4192, 4585, 4768, 5215, 5240, 5960, 7336, 8344, 9170, 10430, 10480, 11920, 14672, 16688, 18340, 19519, 20860, 20960, 23840, 29344, 33376, 36680, 39038, 41720, 73360, 78076, 83440, 97595, 136633, 146720, 156152, 166880, 195190, 273266, 312304, 390380, 546532, 624608, 683165, 780760, 1093064, 1366330, 1561520, 2186128, 2732660, 3123040, 4372256, 5465320, 10930640, 21861280]

約数ペア:

[(1, 21861280), (2, 10930640), (4, 5465320), (5, 4372256), (7, 3123040), (8, 2732660), (10, 2186128), (14, 1561520), (16, 1366330), (20, 1093064), (28, 780760), (32, 683165), (35, 624608), (40, 546532), (56, 390380), (70, 312304), (80, 273266), (112, 195190), (131, 166880), (140, 156152), (149, 146720), (160, 136633), (224, 97595), (262, 83440), (280, 78076), (298, 73360), (524, 41720), (560, 39038), (596, 36680), (655, 33376), (745, 29344), (917, 23840), (1043, 20960), (1048, 20860), (1120, 19519), (1192, 18340), (1310, 16688), (1490, 14672), (1834, 11920), (2086, 10480), (2096, 10430), (2384, 9170), (2620, 8344), (2980, 7336), (3668, 5960), (4172, 5240), (4192, 5215), (4585, 4768)]