78611920

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:344

約数の個数: 80

約数和(自身を含む): 188894160

約数和(自身を除く): 110282240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 89, 122, 178, 181, 244, 305, 356, 362, 445, 488, 610, 712, 724, 890, 905, 976, 1220, 1424, 1448, 1780, 1810, 2440, 2896, 3560, 3620, 4880, 5429, 7120, 7240, 10858, 11041, 14480, 16109, 21716, 22082, 27145, 32218, 43432, 44164, 54290, 55205, 64436, 80545, 86864, 88328, 108580, 110410, 128872, 161090, 176656, 217160, 220820, 257744, 322180, 434320, 441640, 644360, 883280, 982649, 1288720, 1965298, 3930596, 4913245, 7861192, 9826490, 15722384, 19652980, 39305960, 78611920]

約数ペア:

[(1, 78611920), (2, 39305960), (4, 19652980), (5, 15722384), (8, 9826490), (10, 7861192), (16, 4913245), (20, 3930596), (40, 1965298), (61, 1288720), (80, 982649), (89, 883280), (122, 644360), (178, 441640), (181, 434320), (244, 322180), (305, 257744), (356, 220820), (362, 217160), (445, 176656), (488, 161090), (610, 128872), (712, 110410), (724, 108580), (890, 88328), (905, 86864), (976, 80545), (1220, 64436), (1424, 55205), (1448, 54290), (1780, 44164), (1810, 43432), (2440, 32218), (2896, 27145), (3560, 22082), (3620, 21716), (4880, 16109), (5429, 14480), (7120, 11041), (7240, 10858)]