21317790

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1163}}^1$

素因数の和:1233

約数の個数: 64

約数和(自身を含む): 56318976

約数和(自身を除く): 35001186

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 47, 65, 78, 94, 130, 141, 195, 235, 282, 390, 470, 611, 705, 1163, 1222, 1410, 1833, 2326, 3055, 3489, 3666, 5815, 6110, 6978, 9165, 11630, 15119, 17445, 18330, 30238, 34890, 45357, 54661, 75595, 90714, 109322, 151190, 163983, 226785, 273305, 327966, 453570, 546610, 710593, 819915, 1421186, 1639830, 2131779, 3552965, 4263558, 7105930, 10658895, 21317790]

約数ペア:

[(1, 21317790), (2, 10658895), (3, 7105930), (5, 4263558), (6, 3552965), (10, 2131779), (13, 1639830), (15, 1421186), (26, 819915), (30, 710593), (39, 546610), (47, 453570), (65, 327966), (78, 273305), (94, 226785), (130, 163983), (141, 151190), (195, 109322), (235, 90714), (282, 75595), (390, 54661), (470, 45357), (611, 34890), (705, 30238), (1163, 18330), (1222, 17445), (1410, 15119), (1833, 11630), (2326, 9165), (3055, 6978), (3489, 6110), (3666, 5815)]