28447960

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 66290400

約数和(自身を除く): 37842440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 89, 122, 131, 178, 244, 262, 305, 356, 445, 488, 524, 610, 655, 712, 890, 1048, 1220, 1310, 1780, 2440, 2620, 3560, 5240, 5429, 7991, 10858, 11659, 15982, 21716, 23318, 27145, 31964, 39955, 43432, 46636, 54290, 58295, 63928, 79910, 93272, 108580, 116590, 159820, 217160, 233180, 319640, 466360, 711199, 1422398, 2844796, 3555995, 5689592, 7111990, 14223980, 28447960]

約数ペア:

[(1, 28447960), (2, 14223980), (4, 7111990), (5, 5689592), (8, 3555995), (10, 2844796), (20, 1422398), (40, 711199), (61, 466360), (89, 319640), (122, 233180), (131, 217160), (178, 159820), (244, 116590), (262, 108580), (305, 93272), (356, 79910), (445, 63928), (488, 58295), (524, 54290), (610, 46636), (655, 43432), (712, 39955), (890, 31964), (1048, 27145), (1220, 23318), (1310, 21716), (1780, 15982), (2440, 11659), (2620, 10858), (3560, 7991), (5240, 5429)]