20849960

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1$

素因数の和:338

約数の個数: 64

約数和(自身を含む): 49610880

約数和(自身を除く): 28760920

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 131, 173, 184, 230, 262, 346, 460, 524, 655, 692, 865, 920, 1048, 1310, 1384, 1730, 2620, 3013, 3460, 3979, 5240, 6026, 6920, 7958, 12052, 15065, 15916, 19895, 22663, 24104, 30130, 31832, 39790, 45326, 60260, 79580, 90652, 113315, 120520, 159160, 181304, 226630, 453260, 521249, 906520, 1042498, 2084996, 2606245, 4169992, 5212490, 10424980, 20849960]

約数ペア:

[(1, 20849960), (2, 10424980), (4, 5212490), (5, 4169992), (8, 2606245), (10, 2084996), (20, 1042498), (23, 906520), (40, 521249), (46, 453260), (92, 226630), (115, 181304), (131, 159160), (173, 120520), (184, 113315), (230, 90652), (262, 79580), (346, 60260), (460, 45326), (524, 39790), (655, 31832), (692, 30130), (865, 24104), (920, 22663), (1048, 19895), (1310, 15916), (1384, 15065), (1730, 12052), (2620, 7958), (3013, 6920), (3460, 6026), (3979, 5240)]