21284380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1153}}^1$

素因数の和:1246

約数の個数: 48

約数和(自身を含む): 48855744

約数和(自身を除く): 27571364

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1153, 1420, 1846, 2306, 3692, 4612, 4615, 5765, 9230, 11530, 14989, 18460, 23060, 29978, 59956, 74945, 81863, 149890, 163726, 299780, 327452, 409315, 818630, 1064219, 1637260, 2128438, 4256876, 5321095, 10642190, 21284380]

約数ペア:

[(1, 21284380), (2, 10642190), (4, 5321095), (5, 4256876), (10, 2128438), (13, 1637260), (20, 1064219), (26, 818630), (52, 409315), (65, 327452), (71, 299780), (130, 163726), (142, 149890), (260, 81863), (284, 74945), (355, 59956), (710, 29978), (923, 23060), (1153, 18460), (1420, 14989), (1846, 11530), (2306, 9230), (3692, 5765), (4612, 4615)]