18942954640

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{947}}^1\times {\mathrm{4099}}^1$

素因数の和:5120

約数の個数: 80

約数和(自身を含む): 44822577600

約数和(自身を除く): 25879622960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 947, 976, 1220, 1894, 2440, 3788, 4099, 4735, 4880, 7576, 8198, 9470, 15152, 16396, 18940, 20495, 32792, 37880, 40990, 57767, 65584, 75760, 81980, 115534, 163960, 231068, 250039, 288835, 327920, 462136, 500078, 577670, 924272, 1000156, 1155340, 1250195, 2000312, 2310680, 2500390, 3881753, 4000624, 4621360, 5000780, 7763506, 10001560, 15527012, 19408765, 20003120, 31054024, 38817530, 62108048, 77635060, 155270120, 236786933, 310540240, 473573866, 947147732, 1183934665, 1894295464, 2367869330, 3788590928, 4735738660, 9471477320, 18942954640]

約数ペア:

[(1, 18942954640), (2, 9471477320), (4, 4735738660), (5, 3788590928), (8, 2367869330), (10, 1894295464), (16, 1183934665), (20, 947147732), (40, 473573866), (61, 310540240), (80, 236786933), (122, 155270120), (244, 77635060), (305, 62108048), (488, 38817530), (610, 31054024), (947, 20003120), (976, 19408765), (1220, 15527012), (1894, 10001560), (2440, 7763506), (3788, 5000780), (4099, 4621360), (4735, 4000624), (4880, 3881753), (7576, 2500390), (8198, 2310680), (9470, 2000312), (15152, 1250195), (16396, 1155340), (18940, 1000156), (20495, 924272), (32792, 577670), (37880, 500078), (40990, 462136), (57767, 327920), (65584, 288835), (75760, 250039), (81980, 231068), (115534, 163960)]