20880544

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{563}}^1$

素因数の和:653

約数の個数: 48

約数和(自身を含む): 44059680

約数和(自身を除く): 23179136

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 61, 76, 122, 152, 244, 304, 488, 563, 608, 976, 1126, 1159, 1952, 2252, 2318, 4504, 4636, 9008, 9272, 10697, 18016, 18544, 21394, 34343, 37088, 42788, 68686, 85576, 137372, 171152, 274744, 342304, 549488, 652517, 1098976, 1305034, 2610068, 5220136, 10440272, 20880544]

約数ペア:

[(1, 20880544), (2, 10440272), (4, 5220136), (8, 2610068), (16, 1305034), (19, 1098976), (32, 652517), (38, 549488), (61, 342304), (76, 274744), (122, 171152), (152, 137372), (244, 85576), (304, 68686), (488, 42788), (563, 37088), (608, 34343), (976, 21394), (1126, 18544), (1159, 18016), (1952, 10697), (2252, 9272), (2318, 9008), (4504, 4636)]