21191560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{491}}^1$

素因数の和:598

約数の個数: 64

約数和(自身を含む): 52073280

約数和(自身を除く): 30881720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 83, 104, 130, 166, 260, 332, 415, 491, 520, 664, 830, 982, 1079, 1660, 1964, 2158, 2455, 3320, 3928, 4316, 4910, 5395, 6383, 8632, 9820, 10790, 12766, 19640, 21580, 25532, 31915, 40753, 43160, 51064, 63830, 81506, 127660, 163012, 203765, 255320, 326024, 407530, 529789, 815060, 1059578, 1630120, 2119156, 2648945, 4238312, 5297890, 10595780, 21191560]

約数ペア:

[(1, 21191560), (2, 10595780), (4, 5297890), (5, 4238312), (8, 2648945), (10, 2119156), (13, 1630120), (20, 1059578), (26, 815060), (40, 529789), (52, 407530), (65, 326024), (83, 255320), (104, 203765), (130, 163012), (166, 127660), (260, 81506), (332, 63830), (415, 51064), (491, 43160), (520, 40753), (664, 31915), (830, 25532), (982, 21580), (1079, 19640), (1660, 12766), (1964, 10790), (2158, 9820), (2455, 8632), (3320, 6383), (3928, 5395), (4316, 4910)]