19718325

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 39926016

約数和(自身を除く): 20207691

約数列:

[1, 3, 5, 9, 11, 15, 25, 31, 33, 45, 55, 75, 93, 99, 155, 165, 225, 257, 275, 279, 341, 465, 495, 771, 775, 825, 1023, 1285, 1395, 1705, 2313, 2325, 2475, 2827, 3069, 3855, 5115, 6425, 6975, 7967, 8481, 8525, 11565, 14135, 15345, 19275, 23901, 25443, 25575, 39835, 42405, 57825, 70675, 71703, 76725, 87637, 119505, 127215, 199175, 212025, 262911, 358515, 438185, 597525, 636075, 788733, 1314555, 1792575, 2190925, 3943665, 6572775, 19718325]

約数ペア:

[(1, 19718325), (3, 6572775), (5, 3943665), (9, 2190925), (11, 1792575), (15, 1314555), (25, 788733), (31, 636075), (33, 597525), (45, 438185), (55, 358515), (75, 262911), (93, 212025), (99, 199175), (155, 127215), (165, 119505), (225, 87637), (257, 76725), (275, 71703), (279, 70675), (341, 57825), (465, 42405), (495, 39835), (771, 25575), (775, 25443), (825, 23901), (1023, 19275), (1285, 15345), (1395, 14135), (1705, 11565), (2313, 8525), (2325, 8481), (2475, 7967), (2827, 6975), (3069, 6425), (3855, 5115)]