19895421

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 14578179

約数列:

[1, 3, 7, 13, 21, 29, 39, 49, 87, 91, 147, 203, 273, 359, 377, 609, 637, 1077, 1131, 1421, 1911, 2513, 2639, 4263, 4667, 7539, 7917, 10411, 14001, 17591, 18473, 31233, 32669, 52773, 55419, 72877, 98007, 135343, 218631, 228683, 406029, 510139, 686049, 947401, 1530417, 2842203, 6631807, 19895421]

約数ペア:

[(1, 19895421), (3, 6631807), (7, 2842203), (13, 1530417), (21, 947401), (29, 686049), (39, 510139), (49, 406029), (87, 228683), (91, 218631), (147, 135343), (203, 98007), (273, 72877), (359, 55419), (377, 52773), (609, 32669), (637, 31233), (1077, 18473), (1131, 17591), (1421, 14001), (1911, 10411), (2513, 7917), (2639, 7539), (4263, 4667)]