20453440

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:444

約数の個数: 112

約数和(自身を含む): 58228992

約数和(自身を除く): 37775552

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 320, 322, 368, 397, 448, 460, 560, 644, 736, 794, 805, 920, 1120, 1288, 1472, 1588, 1610, 1840, 1985, 2240, 2576, 2779, 3176, 3220, 3680, 3970, 5152, 5558, 6352, 6440, 7360, 7940, 9131, 10304, 11116, 12704, 12880, 13895, 15880, 18262, 22232, 25408, 25760, 27790, 31760, 36524, 44464, 45655, 51520, 55580, 63520, 63917, 73048, 88928, 91310, 111160, 127040, 127834, 146096, 177856, 182620, 222320, 255668, 292192, 319585, 365240, 444640, 511336, 584384, 639170, 730480, 889280, 1022672, 1278340, 1460960, 2045344, 2556680, 2921920, 4090688, 5113360, 10226720, 20453440]

約数ペア:

[(1, 20453440), (2, 10226720), (4, 5113360), (5, 4090688), (7, 2921920), (8, 2556680), (10, 2045344), (14, 1460960), (16, 1278340), (20, 1022672), (23, 889280), (28, 730480), (32, 639170), (35, 584384), (40, 511336), (46, 444640), (56, 365240), (64, 319585), (70, 292192), (80, 255668), (92, 222320), (112, 182620), (115, 177856), (140, 146096), (160, 127834), (161, 127040), (184, 111160), (224, 91310), (230, 88928), (280, 73048), (320, 63917), (322, 63520), (368, 55580), (397, 51520), (448, 45655), (460, 44464), (560, 36524), (644, 31760), (736, 27790), (794, 25760), (805, 25408), (920, 22232), (1120, 18262), (1288, 15880), (1472, 13895), (1588, 12880), (1610, 12704), (1840, 11116), (1985, 10304), (2240, 9131), (2576, 7940), (2779, 7360), (3176, 6440), (3220, 6352), (3680, 5558), (3970, 5152)]